Most axis bombers were nothing more than antiquated designs that were slow easy targets with weak defensive fire power and light bomb loads. some exceptions are the Junkers JU88s and JU188s. pretty fast, 6600 lb bombload & decent defensive armament . The JU388 . I don't know if It was considered a production model, but most likely about as many of Them saw service as the Me163s or Ta152s. The Japanese had some fast bombers, but a 2200 lb bombload is a joke. Although the Kawanishi H8K 4 engine seaplane was a mighty aircraft. 290mph at about 16,500 feet, 5 20 mm cannons and a bombload of 4500 lbs. To My knowledge none were produced with landing gear, so They would have to launch from water. So maybe They could be spawned like pt boats from bases near water.